优化: P0 shell stdout修复+灵感路由+3工具新增+ai-md全局CSS+import路径统一

P0 修复:
- B-260615-37: shell.rs 补 Stdio::piped() 修复 run_command stdout/stderr 恒空
  (tokio 默认 inherit 导致 wait_with_output 读不到 pipe)

P1 功能:
- B-260615-36: 路由加 /ideas/:id + Ideas.vue 接 route.params.id + watch
  (修复项目详情点「来源灵感」跳空白页)
- F-260615-08: 新增 file_info 工具(元信息: exists/size/lines/binary/dir)
- F-260615-09: 新增 append_file 工具(追加写入, RiskLevel::Medium)
- F-260615-12: 新增 search_files 工具(文件名 glob 搜索,递归,限50条)
  + search_files_recursive 辅助函数 + i18n zh/en 3工具×2命名空间

DRY/重构:
- CR-260615-09: .ai-md 样式5份→全局 src/styles/ai-md.css(75行)
  AiChat.vue 删71行重复 + main.ts 引入 + typo修正(.a-md→.ai-md)
- 全量 import 路径统一为 @/ 别名(stores/composables/views ~28文件)
  vite.config.ts 加 resolve.alias.{ '@': '/src' }
- i18n 批量改进: store error fallback 11处中文→t() / ToolCard ARG_LABEL
  / useAiSend queue文案 / Dashboard 空态 / Ideas.vue null守卫
- cargo check 0 error / vue-tsc 0 error

src/views/ProjectDetail.vue

@@ -234,14 +234,14 @@ import { useRoute, useRouter } from 'vue-router'
 import { useI18n } from 'vue-i18n'
 import { Message } from '@arco-design/web-vue'
 import { open } from '@tauri-apps/plugin-dialog'
-import { useProjectStore } from '../stores/project'
-import { projectApi } from '../api'
-import { formatDate } from '../utils/time'
-import { parseStack } from '../utils/project'
+import { useProjectStore } from '@/stores/project'
+import { projectApi } from '@/api'
+import { formatDate } from '@/utils/time'
+import { parseStack } from '@/utils/project'
 import { projectStatusLabel, projectStageInfo, taskStatusLabel, taskStatusClass } from '../constants/project'
-import ConfirmDialog from '../components/ConfirmDialog.vue'
-import { useConfirm } from '../composables/useConfirm'
-import { useRendered } from '../composables/useMarkdown'
+import ConfirmDialog from '@/components/ConfirmDialog.vue'
+import { useConfirm } from '@/composables/useConfirm'
+import { useRendered } from '@/composables/useMarkdown'
 
 const route = useRoute()
 const router = useRouter()